| 摘要 |
Self-extinguishing polyolefin compositions comprising for 100 parts of the composition: (1) 5-30 parts of an ammonium phosphate; and (2) 3-20 parts of one or more nitrogen-containing compounds selected from (a) benzyl-guanamine; (b) reaction products of an aldehyde with phenyl- or benzyl-guanamine; (c) reaction products of an aldehyde with two nitrogen-containing compounds, one being guanamine, phenyl-guanamine, benzyl-guanamine or melamine, and the other being a compound containing the functions >C=O and/or >C=S and >NH inserted in a cyclic structure, such as ethylene-urea; the molar ration between the two nitrogen-containing compounds present in (c) ranging from 4:1 to 1:4. The compositions are endowed with an increaded resistance to heat and to thermo-oxidation. |
